Home / 721,130.44-995,120.94-398,821.72

Finding the Fourth Proportional to 721,130.44, 995,120.94 and 398,821.72

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Solution

The fourth proportional to 721,130.44, 995,120.94 and 398,821.72 is: 550,352.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,130.44 : 995,120.94 = 398,821.72 : x
  2. Step 2: Convert to fraction form
    721,130.44/995,120.94 = 398,821.72/x
  3. Step 3: Cross multiply
    721,130.44x = 995,120.94 × 398,821.72
  4. Step 4: Simplify right side
    721,130.44x = 396,875,844,898.82
  5. Step 5: Solve for x
    x = 396,875,844,898.82/721,130.44
  6. Step 6: Final answer
    x = 550,352.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.